Parsnip yellow fleck and rice tungro spherical viruses resemble picornaviruses and represent two genera in a proposed new plant picornavirus family (Sequiviridae)

Abstract
Parsnip yellow fleck and rice tungro spherical viruses, with monopartite ss RNA genomes, resemble picornaviruses in the polymerase and NTP-binding domains of their encoded polyproteins. Though in separate genera, they may comprise a new family.